#header {
    width: 100%;
    height: 100px;
    border: 2px solid black;
    background-color: #8c8c8c;
    border-radius: 5px 5px 0px 0px;
    position: static;
}

.left {
    height: 500px;
    width: 150px;
    border-left: 2px solid black;
    border-right: 2px solid black;
    background-color: #fff;
    float: left;
}

.right {
    height: 500px;
    width: 150px;
    border-left: 2px solid black;
    border-right: 2px solid black;
    background-color: #fff;
    float: right;
}
#footer {
    width: 100%;
    height: 100px;
    border: 2px solid black;
    background-color: #8c8c8c;
    border-radius: 0px 0px 5px 5px;
    clear: both;
    position: relative;
}